Results 171 to 180 of about 27,900 (194)
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Photochemistry and Photobiology, 1988
Abstract— DNA purine modifications by ultraviolet irradiation have not been as extensively studied as those of pyrimidines. However, a number of such reactions have been identified. These include photochemical addition of amino acids, photoalkylation by alcohols, amines and other compounds, photochemical activation of procarcinogens to mutagenic ...
N J, Duker, P E, Gallagher
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Abstract— DNA purine modifications by ultraviolet irradiation have not been as extensively studied as those of pyrimidines. However, a number of such reactions have been identified. These include photochemical addition of amino acids, photoalkylation by alcohols, amines and other compounds, photochemical activation of procarcinogens to mutagenic ...
N J, Duker, P E, Gallagher
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OMEGA PHOTOPRODUCTION AT GRAAL
GDH 2002, 2003A tagged and polarized Compton backscattered photon beam is produced at the GRAAL facility in the energy range from 0.5 GeV up to 1.5 GeV. We present new very preliminary results on beam polarization asymmetry Sigma for the omega photoproduction on the proton. These results confirm the relevance of resonance contributions to polarization observables.
O. BARTALINI +32 more
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Physical Review C, 1991
A measurement of the total cross section for \ensuremath{\eta}-meson photoproduction from light nuclei will determine the isotopic spin dependence of 〈${\mathit{S}}_{11}$\ensuremath{\Vert}${\mathit{j}}_{\mathit{e}\mathit{m}}$\ensuremath{\Vert}N〉. This acts as a test of models of ${\mathrm{SU}}_{6}$ breaking.
, Rosenthal, , Forest, , Gonzales
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A measurement of the total cross section for \ensuremath{\eta}-meson photoproduction from light nuclei will determine the isotopic spin dependence of 〈${\mathit{S}}_{11}$\ensuremath{\Vert}${\mathit{j}}_{\mathit{e}\mathit{m}}$\ensuremath{\Vert}N〉. This acts as a test of models of ${\mathrm{SU}}_{6}$ breaking.
, Rosenthal, , Forest, , Gonzales
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Laser-Induced Axion Photoproduction
Physical Review Letters, 1986Axion photoproduction is suggested as a systematic technique for investigating the coupling of new elementary pseudoscalar or scalar particles in the megaelectronvolt mass range to leptons, photons, and hadronic matter. The experiments involve a configuration where a low-energy photon collides with a relativistic electron beam.
, Brodsky +3 more
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International Journal of Modern Physics A, 2005
2π-photoproduction is one of the promising reactions to search for new baryon resonances and to investigate the properties of resonances in general. Recent data taken by various experiments show interesting resonance structures. First preliminary partial wave analysis results of the γp→pπ0π0-CB-ELSA data indicate the observation of baryon resonances ...
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2π-photoproduction is one of the promising reactions to search for new baryon resonances and to investigate the properties of resonances in general. Recent data taken by various experiments show interesting resonance structures. First preliminary partial wave analysis results of the γp→pπ0π0-CB-ELSA data indicate the observation of baryon resonances ...
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PHOTOSENSITIZATION BY METHOTREXATE PHOTOPRODUCTS
Photochemistry and Photobiology, 1983Abstract— Photoproducts induced upon excitation of methotrexate by UV light have been separated by ion exchange chromatography. They include 2,4‐diamino‐6‐pteridinecarboxylic acid, 2,4‐diamino‐6‐pteridine‐carboxaldehyde and other unidentified pteridine derivatives.
C, Chahidi +4 more
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Inclusive positive pion photoproduction
Physical Review C, 1996Inclusive ${\mathrm{\ensuremath{\pi}}}^{+}$ photoproduction below the \ensuremath{\Delta}(1232) resonance has been measured from H, C, Ca, Sn, and Pb at laboratory angles of 51\ifmmode^\circ\else\textdegree\fi{}, 81\ifmmode^\circ\else\textdegree\fi{}, 109\ifmmode^\circ\else\textdegree\fi{}, and 141\ifmmode^\circ\else\textdegree\fi{} using tagged ...
, Fissum +9 more
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Observables in kaon photoproduction
Physical Review C, 1989We briefly review the status of recent analyses of kaon photoproduction data. The utility of future measurements of other kaon photoproduction observables is discussed. We note that a set of target polarization data has been neglected in all recent analyses. The constraint imposed by this data set is illustrated.
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